I.4.40 Curvilinear Integrals

YSLIVIA: Find the value of integrated on a given line. \ (\ int \ left (x^{2}+y \ right) d x+\ left (y^{2}+x \ right) d y \) by a broken, consisting of segments of straight lines \ (x = 1, y = 5 \) from \ (a (1.2) \) to \ (B (4.5) \).